[Gmsh] Connecting structured to unstructured meshed volumes in 3D

[Christophe Geuzaine]

> On 10 Mar 2020, at 12:26, Octavio Castillo Reyes <ocastilloreyes at gmail.com> wrote:
> 
> Thank you for your clarification. Now is working!
> 
> In addition, it is possible use only tetrahedral elements to reproduce this kind of mesh? 
> 

Sure, just remove "Recombine".

Christophe


> 
> Best regards
> 
> O. 
> 
> Sent from my Samsung Galaxy smartphone.
> 
> On Tue, 10 Mar 2020, 12:19 Christophe Geuzaine, <cgeuzaine at uliege.be> wrote:
> 
> 
> > On 10 Mar 2020, at 09:01, Octavio Castillo Reyes <ocastilloreyes at gmail.com> wrote:
> > 
> > Dear Prof. Ghristophhe, 
> > 
> > the error log (including gmsh version) is attached to this email. 
> > 
> 
> The error 
> 
>    Error   : Singular value decomposition requires LAPACK
> 
> means that your version of Gmsh (that you recompiled from source?) does not include LAPACK. This is necessary for mesh generation.
> 
> Try the binary versions from the website. I also advise using a more recent version.
> 
> Christophe
> 
> 
> > Best regards
> > 
> > O.
> > 
> > On Sun, Mar 8, 2020 at 8:40 PM Christophe Geuzaine <cgeuzaine at uliege.be> wrote:
> > 
> > 
> > > On 5 Mar 2020, at 09:32, Octavio Castillo Reyes <ocastilloreyes at gmail.com> wrote:
> > > 
> > > Prof. Ghristophhe, thank you for your tip!
> > > 
> > > Right now I have tried it but I have obtained the following errors:
> > > 
> > 
> > Which version of Gmsh? It should work as-is with recent versions.
> > 
> > Christophe
> > 
> > > Error   : No elements in region 2 
> > > Info    : Done meshing 3D (0.005192 s)
> > > Info    : Optimizing 3D mesh...
> > > Info    : Optimizing volume 2
> > > Info    : Done optimizing 3D mesh (0.00019 s)
> > > Info    : 537 vertices 1236 elements
> > > Error   : ------------------------------
> > > Error   : Mesh generation error summary
> > > Error   :   104 warnings
> > > Error   :   105 errors
> > > Error   : Check the full log for details
> > > Error   : ------------------------------
> > > 
> > > In any case, this idea is very good. In spite of this, I would like to know if it is possible to replicate this case only with tetrahedra, in this way I can avoid using different base functions in my finite element code.
> > > 
> > > Best regards
> > > 
> > > O.
> > > 
> > > On Thu, Mar 5, 2020 at 9:19 AM Christophe Geuzaine <cgeuzaine at uliege.be> wrote:
> > > 
> > > 
> > > > On 3 Mar 2020, at 13:45, Octavio Castillo Reyes <ocastilloreyes at gmail.com> wrote:
> > > > 
> > > > Dear gmsh developers, 
> > > > 
> > > > I would like to know if it is possible build a tetrahedral mesh with following features: 
> > > > 
> > > > - structured tetrahedral  elements on boundaries
> > > > - unstructured tetrahedral elements inside the domain
> > > > 
> > > > Could you give some tips/ideas to build this kind of mesh (if possible).
> > > > 
> > > 
> > > I will be done automatically (with a pyramid layer to connect both). Here's an example:
> > > 
> > > https://gitlab.onelab.info/gmsh/gmsh/-/blob/master/benchmarks/extrude/hybrid_pyramids.geo
> > > 
> > > Christophe
> > > 
> > > 
> > > 
> > > > Best regards
> > > > 
> > > > O.
> > > > 
> > > > _______________________________________________
> > > > gmsh mailing list
> > > > gmsh at onelab.info
> > > > http://onelab.info/mailman/listinfo/gmsh
> > > 
> > > — 
> > > Prof. Christophe Geuzaine
> > > University of Liege, Electrical Engineering and Computer Science 
> > > http://www.montefiore.ulg.ac.be/~geuzaine
> > > 
> > > 
> > > 
> > > _______________________________________________
> > > gmsh mailing list
> > > gmsh at onelab.info
> > > http://onelab.info/mailman/listinfo/gmsh
> > 
> > — 
> > Prof. Christophe Geuzaine
> > University of Liege, Electrical Engineering and Computer Science 
> > http://www.montefiore.ulg.ac.be/~geuzaine
> > 
> > 
> > 
> > <hybrid_pyramids.err>
> 
> — 
> Prof. Christophe Geuzaine
> University of Liege, Electrical Engineering and Computer Science 
> http://www.montefiore.ulg.ac.be/~geuzaine
> 
> 
> 

— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine